CN110424278A - A kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring - Google Patents
A kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring Download PDFInfo
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- CN110424278A CN110424278A CN201910661999.7A CN201910661999A CN110424278A CN 110424278 A CN110424278 A CN 110424278A CN 201910661999 A CN201910661999 A CN 201910661999A CN 110424278 A CN110424278 A CN 110424278A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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Abstract
The present invention relates to a kind of construction methods of the pre-stressed carbon fiber plate reinforcement of distributed anchoring, comprising the following steps: step 1: smearing in the face to be reinforced to reinforcement and pastes colloid；Step 2: carbon fiber board both ends are connect with tensioning part, the first end face of carbon fiber board and reinforcing face to reinforcement are bonded, tensioning part is fixedly connected with to reinforcement, is pasted and is carried out tensioning to carbon fiber board with tensioning part before colloid solidifies, until carbon fiber board generates the prestressing force of setting；Step 3: being smeared in the second end face of carbon fiber board first end face opposite side and multiple compressing member surfaces and paste colloid, compressing member painting is bonded with the second end face of carbon fiber board, and connect by regulating part with to reinforcement, regulating part is adjusted, is compressed using compressing member by carbon fiber board and to reinforcement；Step 4: after colloid solidification to be pasted, carbon fiber board end being cut, removes tensioning part, construction method consolidation effect of the invention is good, and carbon fiber board will not fall off.
Description
Technical field
The present invention relates to technical field of bridge construction, and in particular to a kind of pre-stressed carbon fiber plate reinforcing of distributed anchoring
The construction method of beam.
Background technique
Currently used bridge reinforcing method mainly has the methods of carbon fiber board reinforcing, dead burning plate, enlarged cross section, wherein carbon
Fiberboard method for strengthening has obviously advantage, has excellent mechanical property and good economic effect using carbon fiber board
The characteristics of benefit is widely used in Structural Engineering, is reinforced using carbon fiber board: 1. high-intensitive, high-elastic mould, thickness
It is thin, light-weight；2. material can random length, any intersection, adaptation arbitrary surface and arbitrary shape structure；3. it is corrosion-resistant, resist tired
Labor performance is good；4. easy construction, closely knit in conjunction with concrete；5. material moisture requires strictly, and unsuitable reinforcing joint region.And
And execute-in-place is convenient, has high engineering application value, but inventors have found that carbon fiber board is simply pasted onto
Structural elements surface is reinforced, and tensile stress when component damage in carbon fiber board is not still high, and the intensity of material obtains not
It is played to good.Especially in practical reinforcing engineering, it is reinforced on component often that there is initial loads, at this time according to general
Logical carbon fiber board reinforcement means, then the strain of carbon fiber board will be than the response lag of reinforcing bar in beam during secondary loading
More, it is just more unobvious to reinforce economic effect.
In order to solve drawbacks described above, the reinforcement technique of post-stressed carbon fiber board, but invention human hair are used at present
Existing, which remains more defect: 1) complicated end anchorage system, unfavorable to the stress of anchorage zone concrete；
2) end anchorage system corresponds to anchorage installation difficulty of construction is big, even occurs in engineering, reinforces bridge using pre-stressed carbon fiber plate
Liang Shi, the engineering accident for collapsing anchorage zone concrete pulling after tensioning；3) post-stressed carbon fiber board is in carbon fiber board overall length
Sticking area relies solely on the intermal force that chemical colloid realizes carbon fiber board and beam body concrete, and consolidation effect is bad, and changes
The intermal force for learning colloid is affected by construction technology, is influenced by chemical colloid durability, carbon fiber board is easy to fall off.
Summary of the invention
The purpose of the present invention is in order to overcome the deficiencies of the prior art, provide a kind of pre-stressed carbon fiber plate of distributed anchoring
The construction method of reinforcement, convenient and quick construction, the anchoring system for complexity that no setting is required, consolidation effect is good, and carbon fiber board is not
It can fall off.
To achieve the above object, the present invention adopts the following technical solutions:
A kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring, comprising the following steps:
Step 1: being smeared in the face to be reinforced to reinforcement and paste colloid.
Step 2: carbon fiber board both ends are connect with tensioning part, by the first end face of carbon fiber board and to the reinforcing of reinforcement
Face is bonded, and tensioning part is fixedly connected with to reinforcement, is opened using tensioning part to carbon fiber board before pasting colloid solidification
It draws, until carbon fiber board generates the prestressing force of setting.
Step 3: it is smeared in the second end face of carbon fiber board first end face opposite side and multiple compressing member surfaces and pastes colloid, pressure
The surface that tight part smears stickup colloid is bonded with the second end face of carbon fiber board, and is connect by regulating part with to reinforcement, is adjusted
Regulating part is saved, is compressed using compressing member by carbon fiber board and to reinforcement.
Step 4: after colloid solidification to be pasted, carbon fiber board end being cut, tensioning part is removed.
Further, before step 1 carries out, dabbing processing is carried out in the face to be reinforced to reinforcement, increases and pastes colloid
With the contact area to reinforcement, the sticking strength of colloid is pasted in enhancing.
Further, in the step 2, the tensioning part uses pre-tensioning system anchorage.
Further, in step 3, along to reinforcement medium position to the direction of end position, the distribution density of compressing member
It is gradually reduced.
Further, in step 3, the compressing member uses steel plate.
Further, the steel plate is provided with aperture, and the regulating part uses the chemical bolt to match with the aperture,
To which the connecting hole to match with the chemical bolt is pre-machined on reinforcement, the chemical bolt passes through steel plate by aperture,
It is threadedly coupled by connecting hole with to reinforcement.
Further, chemical bolt is connect using electric wrench with to reinforcement, guarantees that compressing member applies carbon fiber board
Add fixed pressure.
Further, it is described paste colloid with a thickness of 1mm-2mm.
Further, in the step 4, carbon fiber board end position is cut using electric slicer.
Further, in the step 2, compressing member carries out polishing derusting to compressing member surface before smearing stickup colloid,
And with being dried after alcohol wipe.
Beneficial effects of the present invention:
1. construction method of the invention applies pressure to carbon fiber board using multiple compressing members, when can effectively prevent long
Between after use, carbon fiber board is detached from from beam and falls, and extends the service life of beam.
2. construction method of the invention, compressing member is fixed by pasting colloid with carbon fiber board, and carbon fiber board passes through stickup
Colloid is pasted with to reinforcement, and compressing member is connect by regulating part with to reinforcement, compressing member, carbon fiber board and tight to reinforcement
Close combination forms an entirety, bears external force jointly, good to the consolidation effect of beam.
3. construction method of the invention can cut carbon fiber board after pasting colloid solidification, remove tensioning part,
No setting is required permanent anchorage, solve the existing anchoring of traditional carbon fiber board post-tensioned construction embody it is complicated, to anchorage zone
The unfavorable problem of concrete stress, and anchorage can reuse, and it is excessive to apply stress because of beam-ends in work progress
And destruction is generated to beam, it ensure that the safety of construction.
4. construction method of the invention, the reinforcing face to reinforcement carries out dabbing processing so that paste colloid with wait reinforce
The contact surface of beam makes not in approximately the same plane to not allow to be also easy to produce destruction, dislocation and sliding now between reinforcement and stickup colloid
As improving sticking effect.
5. construction method of the invention, compressing member and carbon fiber board are compressed by regulating part using electric wrench, it can be with
Guarantee that compressing member applies the pressure of uniformity to carbon fiber board, prevents carbon fiber board unbalance stress and lead to tilt phenomenon.
6. construction method of the invention, since the medium position deflection deformation of beam is larger, end position deflection deformation is smaller,
Therefore along to reinforcement medium position, to the direction of end position, the distribution density of compressing member is gradually reduced, and both ensure that compression
Part and carbon fiber board treat the consolidation effect of reinforcement, and save the usage quantity of compressing member, reduce construction cost.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the restriction to the application for explaining the application.
Fig. 1 is to assemble schematic front view to reinforcement and carbon fiber board before 1 step 4 of the embodiment of the present invention；
Fig. 2 is to assemble elevational schematic view to reinforcement and carbon fiber board before 1 step 4 of the embodiment of the present invention；
Fig. 3 is to assemble schematic side view to reinforcement and carbon fiber board before 1 step 4 of the embodiment of the present invention；
Fig. 4 is that 1 step 4 back rest of the embodiment of the present invention and carbon fiber board assemble elevational schematic view；
Fig. 5 is that 1 step 4 back rest of the embodiment of the present invention and carbon fiber board assemble schematic side view；
Wherein, 1. to reinforcement, and 2. paste colloid, 3. pre-tensioning system anchorages, 4. carbon fiber boards, 5. steel plates, 6. chemical spiral shells
Bolt.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
In order to facilitate narration, if there is "upper", "lower", " left side " " right side " printed words in the present invention, only expression and attached drawing itself
Upper and lower, left and right direction it is consistent, not to structure rise restriction effect, it is only for convenient for description the present invention and simplification retouch
It states, rather than the equipment of indication or suggestion meaning or element must have a particular orientation, and be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.
As background technique is introduced, the anchoring system of existing carbon fiber board post-tensioned construction method is complicated, for
The stress of anchorage zone is unfavorable, and after long-time use, and carbon fiber board is easy to peel off, and influences consolidation effect, in view of the above-mentioned problems, this
Application proposes a kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring.
In a kind of exemplary embodiment embodiment 1 of the application, as shown in Figs. 1-5, a kind of prestressing force of distributed anchoring
The construction method of carbon fiber board reinforcement, comprising the following steps:
Step 1: being smeared in the face to be reinforced to reinforcement and paste colloid.
Step 2: carbon fiber board both ends are connect with tensioning part, by the first end face of carbon fiber board and to the reinforcing of reinforcement
Face is bonded, and tensioning part is fixedly connected with to reinforcement, is opened using tensioning part to carbon fiber board before pasting colloid solidification
It draws, until carbon fiber board generates the prestressing force of setting.
Step 3: it is smeared in the second end face of carbon fiber board first end face opposite side and multiple compressing member surfaces and pastes colloid, pressure
The surface that tight part smears stickup colloid is bonded with the second end face of carbon fiber board, and is connect by regulating part with to reinforcement, is adjusted
Regulating part is saved, is compressed using compressing member by carbon fiber board and to reinforcement.
Step 4: after colloid solidification to be pasted, carbon fiber board end being cut, tensioning part is removed.
The specific steps of the step 1 are as follows: utilize dabbing equipment in the reinforcing face to reinforcement 1 for sticking carbon fiber plate
Dabbing processing is carried out, sees big stone to cut the dew of the part in the laitance to reinforcement surface, in the present embodiment, dabbing depth is
5mm-10mm, dabbing trace spacing are 30mm or so, and dabbing rate is not less than 90%, after the completion of dabbing, reinforce face table with steel brush outwash
The floating dust in face, and blown off floating dust using electric press air pump.
The stickup colloid 2 stirred evenly is applied on the reinforcing face to reinforcement, the smearing thickness for pasting colloid is
1mm-2mm, in the present embodiment, the stickup colloid uses modified epoxy glue.
The specific steps of the step 2 are as follows:
By the first end face wiped clean of 4 side of carbon fiber board to no dust, carbon fiber board both ends and tensioning part are fixed
Connection, the tensioning part use existing pre-tensioning system anchorage 3, and specific structure herein without describing in detail.In glue
Before body solidification, the first end face of carbon fiber board and the reinforcing face paste to reinforcement are closed, and first opening carbon fiber board both ends
Method is connect by bolt with to reinforcement with anchorage, is then treated reinforcement with anchorage using pre-tensioning system and is carried out tensioning, until carbon
Fiberboard generates the prestressing force of setting.
In the present embodiment, the face of reinforcing is handled using dabbing, so that pasting colloid with the contact surface in the face of reinforcing not same
In a plane, the contact area for pasting colloid and reinforcing face is increased, generates interlocking so that pasting colloid and reinforcing face
Resistance to reinforcement, pastes the interface between colloid and can combine closely bonding, and contact interface is not allowed to be also easy to produce destruction, carbon fiber
After tieing up plate stickup, dislocation, sliding phenomenon are improved.
In the step 3, compressing member use steel plate 5, compressing member setting it is multiple, along to reinforcement medium position to end position
The distribution density in the direction set, compressing member is gradually reduced, i.e., the distance of two neighboring compressing member is gradually reduced, and is set on the steel plate
It sets there are two aperture, the regulating part uses the chemical bolt to match with the aperture, to be pre-machined on reinforcement and institute
State the connecting hole that chemical bolt matches.
In the present embodiment, since the medium position deflection deformation of beam is larger, end position deflection deformation is smaller, thus along to
Reinforcement medium position is gradually reduced to the direction of end position, the distribution density of compressing member, both ensure that compressing member and carbon fiber
Dimension plate treats the consolidation effect of reinforcement, and saves the usage quantity of compressing member, reduces construction cost.
The step 3 method particularly includes:
Polishing derusting is carried out to surface of steel plate, and with drying after alcohol wipe, is used to paste with carbon fiber board in steel plate
The second end face surface of end face and the first end face opposite side of carbon fiber board, which is smeared, pastes colloid, will be multiple before colloid solidification to be pasted
Steel plate is bonded with the second end face of carbon fiber board, is attached steel plate with to reinforcement using chemical bolt 6, is utilized electricity
Wrench adjusts chemical bolt, the unified pressure compaction carbon fiber board for setting multiple steel plates.
The use of the chemical bolt method particularly includes: first drilled on to reinforcement according to design requirement, aperture
Meet design requirement with hole depth, ash will be floated in hole with tools such as air pressure blowpipes and dust is removed, cleaning, will change in retaining hole
The medicament pipe for learning bolt is put into aperture, and the screw portion of chemical bolt is then passed through steel plate, is threaded into medicament pipe, medicine
Agent pipe is broken, and the material in medicament pipe fills aperture, using the fixture nut of electric wrench rotation chemical bolt, until making steel plate
The pressure for applying setting to carbon fiber board completes the operation of chemical bolt after the material solidification in aperture.
The application method of chemical bolt is existing highly developed technology, and detailed application method details is herein without detailed
Thin narration.
Above-mentioned step 2- step 3 is required to complete before pasting colloid solidification, and the time controls in 40min-50min.
The specific steps of the step 4 are as follows:
After steel plate compresses carbon fiber board, insulated curing at least 1 week, curing temperature is controlled at 5 DEG C or more, is conserved to viscous
After rubberizing body is fully cured, carbon fiber board end is cut close to the position of pre-tensioning system anchorage using electric slicer,
Pre-tensioning system is removed from beam with anchorage, facilitates next utilization, the carbon fiber board of rest part can generate retraction, so that beam obtains
Prestressing force achievees the effect that reinforcing.
The construction method of the present embodiment overcomes the defect that traditional carbon fibres plate uses post stretching to construct, and carbon fiber
Dimension plate, steel plate and beam are integrated into a whole, and common stress is good to the consolidation effect of beam, and after long-time use, carbon fiber board exists
It under the action of steel plate, will not fall off, extend the service life of beam.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring, which comprises the following steps:
Step 1: being smeared in the face to be reinforced to reinforcement and paste colloid；
Step 2: carbon fiber board both ends are connect with tensioning part, by the first end face of carbon fiber board and to reinforcement reinforcing face into
Row fitting, tensioning part are fixedly connected with to reinforcement, are pasted and are carried out tensioning to carbon fiber board using tensioning part before colloid solidifies, directly
The prestressing force of setting is generated to carbon fiber board；
Step 3: being smeared in the second end face of carbon fiber board first end face opposite side and multiple compressing member surfaces and paste colloid, compressing member
The surface for smearing stickup colloid is bonded with the second end face of carbon fiber board, and is connect by regulating part with to reinforcement, is adjusted and is adjusted
Part is saved, is compressed using compressing member by carbon fiber board and to reinforcement；
Step 4: after colloid solidification to be pasted, carbon fiber board end being cut, tensioning part is removed.
2. a kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring as described in claim 1, feature
It is, before step 1 carries out, carries out dabbing processing in the face to be reinforced to reinforcement.
3. a kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring as described in claim 1, feature
It is, in the step 2, the tensioning part uses pre-tensioning system anchorage.
4. a kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring as described in claim 1, feature
It is, in step 3, along to reinforcement medium position, to the direction of end position, the distribution density of compressing member is gradually reduced.
5. a kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring as described in claim 1, feature
It is, in step 3, the compressing member uses steel plate.
6. a kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring as claimed in claim 5, feature
It is, the steel plate is provided with aperture, and the regulating part uses the chemical bolt to match with the aperture, to pre- on reinforcement
First process the connecting hole to match with the chemical bolt, the chemical bolt passes through steel plate by aperture, by connecting hole with
It is threadedly coupled to reinforcement.
7. a kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring as claimed in claim 6, feature
It is, is connect chemical bolt with to reinforcement using electric wrench.
8. a kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring as described in claim 1, feature
Be, it is described paste colloid with a thickness of 1mm-2mm.
9. a kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring as described in claim 1, feature
It is, in the step 4, is cut carbon fiber board end position using electric slicer.
10. a kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring as described in claim 1, feature
It is, in the step 2, compressing member carries out polishing derusting to compressing member surface before smearing stickup colloid, and uses alcohol wipe
After dry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910661999.7A CN110424278B (en) | 2019-07-22 | 2019-07-22 | Construction method of distributed anchored prestressed carbon fiber plate reinforcing beam |
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| CN201910661999.7A CN110424278B (en) | 2019-07-22 | 2019-07-22 | Construction method of distributed anchored prestressed carbon fiber plate reinforcing beam |
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| CN110424278B CN110424278B (en) | 2021-07-06 |
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Cited By (3)
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| CN111455878A (en) * | 2020-04-15 | 2020-07-28 | 河北锐驰交通工程咨询有限公司 | Bridge carbon fiber reinforced structure and construction method thereof |
| CN111622130A (en) * | 2020-04-22 | 2020-09-04 | 山东大学 | Bridge reinforcing device, bridge reinforcing method and obtained bridge |
| CN111827139A (en) * | 2020-06-15 | 2020-10-27 | 山东大学 | Group anchor anchorage device and method for simultaneously tensioning multiple prestressed carbon fiber plates |
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| CN111455878A (en) * | 2020-04-15 | 2020-07-28 | 河北锐驰交通工程咨询有限公司 | Bridge carbon fiber reinforced structure and construction method thereof |
| CN111622130A (en) * | 2020-04-22 | 2020-09-04 | 山东大学 | Bridge reinforcing device, bridge reinforcing method and obtained bridge |
| CN111622130B (en) * | 2020-04-22 | 2021-09-28 | 山东大学 | Concrete bridge prestress distributed anchoring device and method |
| CN111827139A (en) * | 2020-06-15 | 2020-10-27 | 山东大学 | Group anchor anchorage device and method for simultaneously tensioning multiple prestressed carbon fiber plates |
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| CN110424278B (en) | 2021-07-06 |
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